Question 465824: 1. Find the mean of the distribution shown.
x 0 3 5
P(x) 0.36 0.40 0.24
2. The following distribution is not a probability distribution because
x -5 -4 -3 -2 -1
P(x) 0.11 0.16 0.42 0.16 0.30
3. The following distribution is not a probability distribution because
x -5 -4 -3 -2 -1
P(x) 0.20 0.20 –0.23 0.54 0.29
4. What probability value would be needed to complete the following probability distribution?
x -5 -1 0 1 4
P(x) 0.09 0.25 0.15 0.27
5. There are 50,000 people at a stadium watching a soccer match, and 40,000 of them are male. If 3 people are chosen at random, what is the probability that all 3 of them are male?
6. A researcher surveyed college students to study their opinion about the proposed change in smoking rules. The researcher asked a group of 20 students – 11 of them supported the change, 6 of them did not, and 3 had no opinion. This is not a binomial model because
7. Which of the following pairs of probability values could complete the following probability distribution?
8. A school is sending 11 children to a camp. If 20% of the children in the school are first graders, and the 11 children are selected at random, what is the mean and variance of the number of first graders chosen?
9. Find the mean of the distribution shown.
x 1 2
P(x) 0.46 0.54
10. On a Saturday evening, 34% of the people in Chicago go out to dinner, 18% see a movie, 13% have a party, and 35% stay home. Seventeen people are randomly selected. Can the probability that exactly 4 of them stay home be computed using a binomial model?
11. A coin is tossed five times. Find the probability of getting exactly three heads.
12. Find the mean of the distribution shown.
x -3 -2 -1 0
P(x) 0.19 0.24 0.40 0.17
13. Find the mean of the distribution shown.
x 2 3 4
P(x) 0.30 0.24 0.46
14. A computer store has 50 printers of which 35 are laser printers and 15 are ink jet printers. If a group of 10 printers is chosen at random from the store, find the mean and variance of the number of ink jet printers.
15. A researcher calculated the values and probabilities for a random variable X as shown below. Unfortunately, he erased the last value and needs to figure out what it was. If the mean of X was 2.2, then what was the last value?
16. What value would be needed to complete the following probability distribution?
17. The probability of failure for taking the bar exam in Philadelphia is 41%. If 375 people take the bar exam, what is the expected mean number of failures?
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
What do you think the probability is that someone is going to do an entire 17 question Stat assignment for you? Here are some situations with similar probabilities:
Snowball in hell.
When pigs fly.
Electing an honest politician.
Are you beginning to get the idea?
Go back and re-read (or read as the case may be) the instructions for posting questions on this site. Pay particular attention to the one that says "One question per post" When you have read that rule enough times that you have the concept clearly fixed in your mind, start reading the part about explaining where you are having difficulty and being specific about what help you need.
If you think I am being too harsh with you, please understand that not only have I had a long, hard day, I also really, really, really dislike lazy people who have no desire to learn anything but are trying to get someone else to do their work for them with the least amount of effort possible.
John
My calculator said it, I believe it, that settles it
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